Friday, May24, 2019 L-36.com


Marine Weather and Tides
San Leandro, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:50AMSunset 8:19PM Friday May 24, 2019 6:15 PM PDT (01:15 UTC) Moonrise 12:00AMMoonset 9:58AM Illumination 65% Phase: Waning Gibbous; Moon at 21 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 221 Pm Pdt Fri May 24 2019
Tonight..SW winds 5 to 15 kt. Gusts up to 20 kt this evening.
Sat..SW winds 5 to 15 kt.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt.
Sun..W winds 5 to 15 kt with gusts up to 25 kt. A slight chance of showers.
Sun night..SW winds 5 to 15 kt.
Memorial day..SW winds 5 to 15 kt.
Mon night..SW winds 5 to 10 kt.
Tue..W winds 5 to 15 kt.
Wed..W winds 5 to 15 kt.
PZZ500 221 Pm Pdt Fri May 24 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northerly flow will develop tonight as a low pressure moves into the great basin. Gusty winds will continue into the upcoming weekend. Moderate northwest swell will continue through the weekend with steep fresh swell generated by the gusty winds.


7 Day Forecast for Marine Location Near San Leandro, CA
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location: 37.68, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 242032
afdmtr
area forecast discussion
national weather service san francisco bay area
132 pm pdt Fri may 24 2019

Synopsis Mainly dry conditions are forecast through Saturday,
along with continued cooler than normal temperatures.

Unseasonably cool and unsettled conditions are forecast to develop
later in the weekend as a system drops in from the north, with
scattered showers maybe a stray thunderstorm possible on Sunday.

Dry weather should return by memorial day, but temperatures will
remain cool into early next week.

Discussion As of 1:32 pm pdt Friday... Visible satellite
imagery shows some areas of low clouds lingering over parts of the
san francisco and monterey bay areas this early afternoon. These
low clouds are preventing efficient solar heating thus far this
afternoon for some locations. For example, the sonoma county
airport (ksts) is running 12 degrees cooler than this time 24
hours ago as a consequence to the marine stratus. The most recent
satellite trends reveal that clearing is occurring in the north
bay valleys, but with the delayed sunshine, have gone ahead and
dropped afternoon maximum temperatures for most north bay
locations by several degrees. The east bay south of the bay bridge
as well as the south bay have been mostly sunny since mid-
morning, and are actually running several degrees warmer than 24
hours ago. By the time the afternoon wraps up, high temperatures
along the coast will warm to the upper 50s to 60s while interior
locations will warm to the middle upper 60s to middle 70s. These
values equate to about 3 to 9 degrees below late may
climatological normal values.

If you're looking for warm weather in the bay area for the
holiday weekend, I do not have good news for you. There is high
confidence of continued below normal temperatures through memorial
day as another upper level low drops south from the pacific
northwest by the second half of the weekend. This upper low will
bring a reinforced shot of cooler air, as well as another
opportunity of rain showers on Sunday. Snow levels will drop to
around 5,000 ft, per the official forecast and the national blend
of models (nbm); however, the 12z run of our local in-house wrf
drops snow levels to 4,200 to 4,500 ft for some locations. Just to
quantify how anomalous this upper low is -- the 850 mb
geopotential height levels over our area are forecast to
correspond to about -3 to -4 sigma (standard deviations) with
respect to the 1979-2009 climate forecast system reanalysis
(cfsr). At the surface, these temperatures will translate to about
10 to 20 degrees below normal. Hikers, campers, and outdoor
enthusiasts with plans to head to the higher elevations on Sunday
should plan accordingly for cold temperatures and rain showers, as
well as the possibility of isolated snow showers if snow levels
drop lower than the present official forecast. Will also have to
keep a close eye on the possibility of thunder for parts of the
area, but for now think the best odds will be to our east in the
sierra.

For memorial day, temperatures should begin to rebound as the
upper low exits the area with highs in the 50s and 60s along the
coast and middle 60s to near 70 for inland communities. Can't rule
out some lingering showers in the mountains during the day, but
think most locations will be dry for the holiday itself. Temperatures
will continue to moderate through the middle of next week with
the nbm bringing back some 80 degree readings returning to the
warmest locations by Wednesday or Thursday. With that said, though,
both the GFS and ECMWF are keeping a trough over the west coast, so
temperatures will likely just return back to near normal values.

There is hope for those waiting for warmer weather -- the climate
prediction center's 8-14 day outlook does begin to favor the
likelihood of experiencing above normal temperatures for the june
1 to 7 period.

Aviation As of 10:33 am pdt Friday... South flow will keep
clouds lingering for sts and monterey bay. Strato-cu continues to
fill in across portions of sf bay, which may impact ops at times.

Vfr for most locations later today, but sts may struggle to clear.

Cigs return tonight, but conf is low for sfo. Gusty winds develop
overnight too.

Vicinity of ksfo... A few CU spilling over sfo at 2k may briefly
impact operations, but it should be shortlived. Will keep bkn for
tonight, but conf is low as some models keep CIGS just N of sfo.

Cigs more likely for oak.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Slow burn off today and will keep cigs
late into the afternoon. A few hours of sct before early return of
cigs this evening.

Marine As of 09:57 am pdt Friday... Southerly flow will prevail
near the coast and with northerly flow over the outer waters
today. Low pressure will move inland over the great basin Friday
night through the weekend and lead to gusty northwest winds over
the coastal waters. Moderate northwest swell will continue through
the weekend with steep fresh swell generated by the gusty winds.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm until 3 am
glw... Pt arena to pigeon pt 10-60 nm from 3 am
sca... Pt arena to pt reyes 0-10 nm from 9 pm until 3 am
glw... Pt arena to pt reyes 0-10 nm from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm from 3 am
public forecast: rowe
aviation: mm
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi33 min W 9.9 G 14 59°F 65°F1014.7 hPa
LNDC1 10 mi27 min W 9.9 G 15 59°F 1014.2 hPa
OBXC1 12 mi27 min 58°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 12 mi27 min W 14 G 19
RTYC1 - 9414523 - Redwood City, CA 12 mi27 min NW 11 G 14 64°F 66°F1013.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi27 min W 13 G 18 58°F 1014.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi27 min W 9.9 G 16 57°F 1013.3 hPa
PXSC1 15 mi27 min 58°F 53°F
FTPC1 - 9414290 - San Francisco, CA 18 mi33 min W 8.9 G 18 56°F 59°F1014.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 19 mi27 min SW 9.9 G 14 59°F 1014.5 hPa
RCMC1 - 9414863 - Richmond, CA 21 mi33 min SW 9.9 G 16 58°F 62°F1014 hPa
UPBC1 25 mi27 min W 11 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi27 min SW 12 G 17 63°F 64°F1012.9 hPa56°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi27 min WSW 14 G 18 62°F 1013.1 hPa
46237 - San Francisco Bar, CA (142) 26 mi75 min 58°F4 ft
PCOC1 - 9415144 - Port Chicago, CA 27 mi27 min W 17 G 19 63°F 63°F1012.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 29 mi27 min NW 11 G 16 68°F 1012 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 36 mi25 min W 9.7 G 12 53°F 55°F5 ft1015 hPa
SFXC1 - San Francisco Bay Reserve, CA 37 mi90 min W 11 69°F 1013 hPa53°F
PRYC1 - 9415020 - Point Reyes, CA 48 mi27 min 58°F1014.6 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA3 mi21 minWNW 1110.00 miFair63°F52°F68%1014.6 hPa
Oakland, Metro Oakland International Airport, CA3 mi22 minW 1610.00 miMostly Cloudy64°F52°F65%1014 hPa
San Carlos Airport, CA11 mi28 minW 710.00 miA Few Clouds66°F51°F60%1013.2 hPa
San Francisco, San Francisco International Airport, CA11 mi79 minW 1610.00 miPartly Cloudy65°F52°F63%1013.8 hPa
Palo Alto Airport, CA14 mi2.5 hrsNNW 1210.00 miA Few Clouds66°F57°F73%1014.6 hPa
Mountain View, Moffett Field, CA18 mi79 minNNW 11 G 1810.00 miFair68°F55°F65%1014 hPa
Livermore, Livermore Municipal Airport, CA19 mi22 minNW 1010.00 miFair69°F53°F57%1012.1 hPa
Half Moon Bay Airport, CA21 mi20 minW 88.00 miOvercast55°F51°F88%1015.6 hPa
Concord, Buchanan Field, CA22 mi22 minW 1310.00 miFair70°F51°F51%1011.5 hPa

Wind History from OAK (wind in knots)
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SW11SW10SW9SW9SW8W4CalmNW7W13W10NW8NW11W13W13W16
1 day agoW12SW5W9W10W7W5W3Calm3SW13SW5SW11SW8SW7SW9SW5SW5SW45W66NW12W13W11
2 days agoW24
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Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts Landing
Click for Map
Fri -- 12:47 AM PDT     Moonrise
Fri -- 04:14 AM PDT     6.27 feet High Tide
Fri -- 05:52 AM PDT     Sunrise
Fri -- 10:58 AM PDT     Moonset
Fri -- 11:50 AM PDT     -0.10 feet Low Tide
Fri -- 07:04 PM PDT     5.88 feet High Tide
Fri -- 08:18 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.33.94.85.76.26.15.54.53.21.90.80.1-0.10.31.22.43.74.85.65.95.75.14.43.7

Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
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Oakland Airport SW
Click for Map
Fri -- 12:47 AM PDT     Moonrise
Fri -- 01:34 AM PDT     0.29 knots Max Flood
Fri -- 04:12 AM PDT     -0.00 knots Slack
Fri -- 05:52 AM PDT     Sunrise
Fri -- 07:32 AM PDT     -0.72 knots Max Ebb
Fri -- 10:58 AM PDT     Moonset
Fri -- 11:31 AM PDT     0.00 knots Slack
Fri -- 02:57 PM PDT     0.54 knots Max Flood
Fri -- 06:30 PM PDT     -0.01 knots Slack
Fri -- 08:18 PM PDT     Sunset
Fri -- 08:23 PM PDT     -0.30 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.30.20-0.2-0.5-0.7-0.7-0.6-0.4-0.10.10.40.50.50.50.40.1-0.1-0.3-0.3-0.2-0.1

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.